[1] https://github.com/django/django/blob/master/django/db/__ini...
What I'm saying is that with PgBouncer you have Django <> PgBouncer <> Postgresql, right?
So what PgBouncer is doing (dealing with several open/close connections) maybe could be done better inside PostgreSQL
[1] https://github.com/django/django/blob/master/django/db/__ini...